How does a fixed exchanged rate set the value of currency

Stocks a, b, and c are similar in some respects: each has an expected return of 10% and a standard deviation of 25%. stocks a and b have returns that are independent of one another; i. e., their correlation coefficient, r, equals zero. stocks a and c have returns that are negatively correlated with one another; i. e., r is less than 0. portfolio ab is a portfolio with half of its money invested in stock a and half in stock b. portfolio ac is a portfolio with half of its money invested in stock a and half invested in stock c. which of the following statements is correct? a. portfolio ab has a standard deviation that is greater than 25%.b. portfolio ac has an expected return that is less than 10%.c. portfolio ac has a standard deviation that is less than 25%.d. portfolio ab has a standard deviation that is equal to 25%.e. portfolio ac has an expected return that is greater than 25%.

Andrea's opportunity cost rate is 12 percent compounded annually. how much must he deposit in an account today if he wants to receive $2,100 at the beginning of each of the next seven years? use the equation method to determine the amount.

One cost-of-living indicator available on the internet shows that a salary of $40,000 in santa barbara, california, is equivalent to $14,000 in wichita, kansas. this is primarily because of housing, which is much less expensive in wichita. what does this difference say about how the federal government calculates poverty?